Paper-bag machine.



N0. 629,472. Patented July 25, I899.

' 1 M. SCHENGK.

PAPER BAG MACHINE.

(Application filed Mar. 23, 1899.)

(No Model.)

5 Sheets-Sheet l.

. 0 4 N, tnsses: U Inventor I. I

Ww$w Attorney No. 629,472. PatentedJuly 25, I899.

M. SCHENCK.

PAPER BAG MACHINE.

. (Application filed Mar. 23, 1899.) (No Model.) I 5 Sheets$heet 2.

. Attorney No. 629,472. Patented July 25, I899.

M SCHENCK PAPER BAG MACHINE.

A l c n max 23 1809) 5 Sheets$heet 3.

(No Model.)

Inventdr w S w Witnesses:

I A I" Attorney No. 629,472. Patented m 25, I899.

, n. SCHENCK.

PAPER BAG MACHINE.

(Application filed Mar. 23, 1899.)

(No Model.) 5 sheets-Sheet 4.

9 J3 E g 41. 31.30

immmm H; 10

e sssz Inventor I WALL/1M]. (n7 Attorney No. 629,472. Patented July 25,I899. M. SCHENCK.

PAPER BAG MACHINE.

(Application flied Mar. 23, 1899 (No Model.) 5 Sheets-Sh9et 5.

Witnesses: Mme/M Inventor Attorney NIT/ED. STATES PATENT Enron.

MURRAY SOHE NCK, OF MlDDLETOlVN, OHIO, ASSIGNOR, BY MESNE ASSIGN- MENTS,TO THE UNION BAG AND PAPER COMPANY, OF NEW JERSEY.

PAPER-BAG MACHINE.

SPECIFICATION forming part of Letters Patent No. 629,472, dated duly 25,1899.

Application filed March 23, 1899. Serial No. 710,136. (No model.)

To all whom it may cancer/t:

Be it known that I, MURRAY SQHENCK, of Middletown, Butler county, Ohio,have invented certain new and useful Improvements in Paper-Bag Machines,(Case 11,) of which the following is a specification.

This-invention pertains toimprovements in paper-bag'machines of thatclass which deal with sections of abellows-folded tube and produce asquare-bottom bag; and it relates to mechanism for opening the end ofthe tube and producing the diamond fold ready for the paste andsubsequent folding of the flaps to complete the bottom. The bag-sectionsare brought within the range of operation of my improved device by meansof a traveling carrier, preferably in the form of the usual rotatingcylinder, to which the bag-section is prop- I erlygripped, the diamondfold beingproduced by the operation of a fly-plate slidingin a tumblermounted eccentrically in a rotary driver, the fiy-plate being given partof its motion by driving-pins on the carrier and the remainder of itsmotion by additional gearing with very quick action.

My improvements will be readily understood from thefollowing'description, taken in connection with the accompanyingdrawings, in which Figure 1 is a side elevation of so much of anordinary paper-bag machine as is concerned with my improvement, aportion of the frame and a press-roller being omitted in order to exposecertain cams; Fig. 2, a plan of the same, the dance-rolls being omittedand one of the cams and the rotary driver appearing partly in horizontalsection; Fig. 3, a perspective view of elemental character, illustratinga bag-section clamped to the carrier 40 partly opened by the action ofthe fly-plate;

Fig. 4, a perspective view of one of the grippers of thecarrier-cylinder; Fig. 5, a perspective view of the fiy-plate; Fig. 6, aperspective view of one of the fixed cams; Fig. 7, a perspective view ofthe rotary driver of the fly-plate; Fig. 8, a perspective View of, the Itumbler which carries the fly-plate; Fig. 9, a perspective view of thefirst dance-roll; Fig.

10,51 perspective view of the second dance,

roll; Fig. 11, a vertical section of the flyplate and its immediateaccessories; Fig. 12,

a side elevation of the so-called finger-gear ing by means of which thefiy-plate is given its rapid motion of rotation to its starting po-'sition after its completion of its work upon the bag-section; Fig. 13, aplanv of a portion of the fly-plate, tumbler, rotary driver, andfinger-gearing, parts appearing in horizontal section; Fig. 14, adiagram showing the fly plate, the dance-rolls, and aportion of thecarrier-cylinder, the fly-plate being in what may be called its initialposition, being ready to attack the bag-section; Fig. 15, a similardiagram showing the fly-plate at the instant of its compressiveengagement with the bag-section; Fig. 16, a similar diagram showing thefly-plate at the completion of its folding work upon the bag-section,the first dance-roll haviu descended and engaged the bag-section; Fig.17, a similar diagram showing the fly-plate in engaged position, butwith the carrier advanced relative thereto, so as to partially withdrawthe bag-section from the toe of the fly-plate, the first dance-rollmoving forward with the carrier and the second dance-roll descendingtoward the carrier Fig. 18, a similar diagram showing the flyplate ashaving been relieved from the bagsection and having begun itsoverturning motion toward initial position, both dance-rolls being inworking position against the bagsection; and Fig. 19, a similar diagramshowing the fly-plate as having continued its returning motion towardinitial position, the first dan ce-roll having completed its work andrisen out of action, the second dance-roll having moved forward with thecarrier and completed its work ready for rising to inactive initialposition.

In describing my invention I will first refer to the par-ts of thebag-section in order to secure definition for certain terms employedconstruction of devices will be described, followed by the descriptionofthe mode of operation.

In the drawings, referring for the present to Fig. 3, 1 indicates thecarrier for supporting and advancing the bag-section and having,preferably, the form of a cylinder carrying the bag-sections upon itsperiphery; 2,

the bagsectionlying thereon; 3, the lower herein, after which thepreferred forms of IOO flap of the bag-bottom, which will be termed theprow-tlap; 4, the usual gripper upon the carrier engaging the prow-flapand serving to hold it to the carrier in case the prowflap is severedfrom the mouth of the preceding bag-section while its bottom is beingdealt with, it being understood that it is customary in paper-bagmachines to either completely sever the tube into bag-sections or toonly partly sever them, so as to leave the lower ply of the mouth of onebag-section connected by a tail with the prow-flap of the succeedingbag-section, my present invention being adapted for use with eithersystem; 5, the upper flap of the bag-bottom, hereinafter termed thetrailing flap, this being the flap which is to be lifted from theprow-flap and folded back flat upon the bag-body, thus opening thebag-bottom and forming the diamond fold; 6, the lower plies of thebellows fold just forward of the main central folding-line, theseportions having a triangular form after the diamond fold has beenformed, and being hereinafter termed the lower triangles, there beingone at each side of the bag-section; 7, the carrier-grips engagingthelower triangle 6 of the bag-section, and thereby holding these portionsof the bag-section nicely to the surface of the carrier, the forwardedges of these grips being at an angle to define the folding-lines forthe lower triangles, these grips moving with the carrier and being ofordinaryconstruction and ll'lOll nting, their office being to hold thelower triangles to the carrier while the diamond fold is being formedand to define the forward lines of the lower triangles and to hold thebag-section to the carrier as long as needed; 8, the up per triangles ofthe bag-section or that portion of the upper plies of the bellows foldlying against the lower triangles before the opening is begun; 9, thefly-plate, with its edge resting across the bag-section at the centralfolding-line of the diamond fold, the tipping operations of this plateserving to define the central folding-line and to open the bag-sectionand form the diamond fold; 10, a grip: per carried by the face of thefly-plate and engaging the trailing flap and holding it to the surfaceof the liy-plate during the opening and folding operation, this gripperin my preferred construction having the form of a pair of smallcylindrical studs covered with soft-rubber tubing; 11, the side gripscarried by the fly-plate, beingin the form of delicate fingers adaptedto swing into the bellows fold and clamp the upper triangles 8 to theflyplate, the working position of these side grips being such that theiredges farthest from the edge of the fly-plate will define the angularfolding-lines of the upper triangles, and 12 the central folding-line ofthe diamond fold.

The elements of the operation may be understood from Fig. 3. Assume thebag-section lying upon the carrier and clamped thereto and only openedto such extent as is due to the springing of the paper. The fly-plate islaid over the trailing flap and its edge brought accurately and firmlydown at the central folding-line of the bag-section, after which grips10 and 11 clamp the trailing flap and upper triangles to the lower faceof the plate. Then while the carrier and bag-section and the active edgeof the fly-plate advance the free edge of the fly-plateis retarded andelevated and finally depressed, the result being the raising and foldingback of the trailing liap andthe formation of the diamond fold, atwhichtime the grips of the fiy-plate may be released and the diamond foldbecome subjected to the action of pressing devices while the fly-platecompletes it rotation ready to present its active edge to a succeedingbagsection.

Proceeding with the drawings and referring to Fig. 4, 13 indicates thebody of one of the carrier-grips 7, of not unusual construction, thesame being pivoted to the side of the carrier so as to swing the gripproperly into the bellows fold of the bag-section, the grip beingoperated by the usual spring for closing it and cam for opening it; 14,the usual roller through which the operating-cam acts in opening thegrip; 15, a bar sliding lengthwise inthe body of the grip; 16, a prongformed upon the outer end of bar 15 and forming, in effect, the rearportion of grip 7; 17, a springupon bar 15, urging prong 16 into theplane of grip 7; 18, a roll or stud on the inner end of bar 15 andadapted to be engaged by a suitable cam to be later described, and 10 apin carried by the side of the carrier, preferably one at each side, theaxis of this pin coinciding with the central foldingline of the diamondfold of the bag-section.

The grip 7 operates as usual in clamping the lower triangles of thebag-section to the carrier. YVhen the flyplate comes down upon thetrailing flap preliminary to beginning its work thereupon, the sidegrips ll of the fly-plate must enter the bellows fold to engage theupper triangles, and it is highly desirable that at this time thebellows fold. shall be slightly opened. In Fig. 4 assume grip 7 to befirmly clamping the bag-section to the carrier. At proper time stud l8rides over a cam, the result being that prong 16 is raised somewhat. Atthis time the fly-plate lies over the bag-section, with its edgeengaging the central folding-line thereof. Consequently the upper pliesof the bellows fold will be pressed up against the plate and the bellowsopened, thus giving the side grips of the fly-plate an opportunity tofreely enter and go into action, after which prong 16 descends andbecomes again merely a part of grip 7.

Proceeding with the drawings, 20 indicates the general fixed frame ofthe machine; 21, Fig. 7, the rotary driver, consisting of a pair ofdisks in line with each other and having spindles journaled in theframe, the disks constituting, in elfect, the end sections of amutilated roller disposed across the carrier 1;

22, eccentric-bearings in the disks of the. rotary driver; 23, astretcher-bar connecting the two disks of the driver, so that the driverforms a rigid rotating structure; 24, the tumbler which carries thefly-plate, this'tumbler consisting of a plate disposed between the disksof the driver and having spindles journaled in the eccentric-bearings ofthe driver, the entire tumbler being best seen in Fig. 8; 25, thespindles of the tumbler, the same being journaled in the disks of thedriver; 26,

guides near each side of the tumbler and engaging grooves in the edgesof the fly-plate, so that the fiy-plate can slide in the tumbler, andthus have its active edge move toward and from the axis of the tumbler;27, fixed facial cams secured to the frame of the machine, one aroundeach of the disks of the rotary driver, the cams presenting theirgrooves inwardly, the cam being best illustrated in Fig. 6; 28, acam-lug projecting from the inner face of each of the cams 27 inposition to be engaged by studs 18, Fig. 4, of the grippers of thecarrier; 29, a cam-lug projecting from the inner face of one of the cams27 to serve in opening the grip 10 of the fiy-.plate at time ofreception of the bag-section; 30, guide-grooves in the inner faces ofcams 27 to support the sashes of the dance-rolls; 31, a cam-lugprojecting from the inner face of one of cams 27 to act upon one of thedancerolls, as later explained; 32, the active edge of the fiy-plate,the same being sufficiently thin to be somewhat flexible, so that theflyplate may exert a firm pressure exactly upon the folding-line of thebag-section regardless of slight inaccuracies of the cams 27, whichcontrol the pressure of the fly-plate; 33, trunnions projecting sidewisefrom the non-active edge of the fly-plate, these trunnions engagingwithin cams 27, whereby the rotary driver carries the tumbler around inan orbit, the fiy-plate revolving with the tumbler and sliding acrossthe driver under the influence of cams 27, acting upon trunnions 33, theflyplate being best shown in Fig. 5; 34, a rockshaft mounted on the faceof the fiy-plate and carrying the trailing-flap gripper 10, hereto: forereferred to, the rocking of this shaft serving to move these grippers toand from the face of the fiy-plate; 35, a second rock-shaft mounted onthe face of the fly-plate; 36, an arm linked to rock-shaft 34 andserving to transmit rocking motion from shaft 35 to shaft 34; 37, aspring on rock-shaft 35, tending to hold grippers 10 in position ofclosure against the face of the fly-plate; 38, an arm on one end ofrock-shaft 35, adapted as the driver revolves the fiy-plate to engagecam-lug 29, Fig. 6, whereby gripper 10 is temporarily opened; 39, Fig.8, an inclined cam formed on one of the spindles of the tumbler andadapted as the fiy-plate slides in the tumbler: to be engaged by arm 38,whereby gripper 10 is temporarily opened for the release of the ba-section; 40, arms formed at'th'e sides of the fly-plate and having attheir extremities notches adapted to be engaged at proper time by thepins 19 of the carrier, the axes of these notches, or their common axis,rather, coinciding with the active edge 32 of the fly-plate; 41, armspivoted on studs at the edges of the face of the flyplate, these armsbearing the side grippers 11, heretofore mentioned, whereby thesegrippers may swing in and out of active position, the hubs of these armshaving each a cam-notch in its lower face; 42, cam proj ections on thefiy-plate engaging said notches in the under surface of arms 41, wherebywhen grippers 11 are swung outwardly they occupy a plane away from thatof the face of the fiy-plate and when they swing inward to activeposition they tend tolie down against the face of the fly-plate; 43,springs on the studs of arms 41, pressing the arms and their.

grippers toward the fly-plate and yielding to permit the action ofprojections 42; 44, a second' pair of arms similarly mounted on studs onthe fiy-plate, but farther from the active edge of the fly-plate; 45,links, one connecting each arm 41 with its fellow arm 44, so that thetwo arms of the pair oscillate in unison; 46, a finger projectingoutwardly from each arm 44; 47, a second finger projecting outwardlyfrom arm 44, this second finger being shorter than arm 46 and in a planenearer the surface of the fly-plate; 48, Fig. 8, a'dog projecting upfrom each side of the tumbler in position to be engaged by finger 46 asthe fiy-plate slides in the tumbler, whereby the opening motion is givento grippers 11, the

tumbler having one of these dogs at each side of the fly-plate, so as toactuate both of the side grippers of the fly-plate; 49, a second pair ofdogs carried by the tumbler and adapted to be engaged by fingers 47 togive grippers 11 their closing motion, dogs 49 being lower than dogs 43and nearer together, so

that long fingers 46 may clear them at their tops, fingers 47 being soshort as to clear dogs 48 entirely; 50, Figs. 2, 12, and 13, a mutilatedpinion fast on one end of the spindle of the tumbler outwardly beyondthe cam 27 at that side of the machine; 51, a mutilated pinion loose onthe spindle of the rotary driver and meshing with pinion 50; 52, aradially projecting finger fast with pinion 51; 53, a

stop-finger pivoted tosthe main frame and adapted to swing into positionto be in the path of finger 52 as the latter revolves, the parts 50, 51,52, and 53, collectively, being herein termed the finger-gear; 54, ashaft mounted in the frame parallel with the rotary driver and turningin unison therewith; 55, a roller thereon and pressing against thecarrier and serving as a press-roll acting upon the diamond fold; 56,Figs. 1 and 2, a cam fast on shaft 54; 57, a bar pivoted to stopfinger53 and straddling shaft 54 and capable of endwise movement; 58, a rolleron bar 57, engaging the periphery of cam 56, whereby as shaft 54 rotatesstop-finger 53 will be moved into the path of finger 52, and 59 gears onshaft 54 and on the spindle of the' rotary driver to serve in givingrotation to the shaft and driver in unison, one turn for each bagsectionto be dealt with, these gears being preferably actuated from the usualmastergear on the carrier.

As the driver rotates it carries the tumbler around in an orbit, thefly-plate going with the tumbler and having a sliding motion therein,the body of the fly-plate thus being carried closer to and farther fromthe carrier. \Vhen the active edge of the fiy-plate is presentedrearwardly and depressed, then pins 19 of the carrier engage the notchesof arms 40 of the fiy-plate, and consequently as the carrier advancesand the driver turns the active edge of the fly-plate will travel alongwith the folding-line of the bag-section, the plate turning on this edgeas an axis so long as the edge of the plate isin contact with thecarrier. During this time trunnions 33, engaging the cams27, hold theedge of the flyplate snugly to the ba -section while the diamond fold isbeing formed. During this interval the finger-gear is without office,the pins of the carrier engaging the arms 40 at this time constituting,in effect, a one-toothed gear, by means of which the fly-plate is forcedto take on a rotary motion, with the trunnions of the tumbler as anaxis. When the edge of the fly-plate reaches the forward extremity ofits motion, its folding working having been fully performed, then thepins of the carrier move on out of notches of arms 40, the carrierhaving no further effect upon the flyplate. At this instant cam 56 movesstopfinger 53 into active position against finger 52, the cam being socontoured and timed that the effect of the finger-gear will be for aninstant merely to steady the fiy-plate, after which the finger-gearbecomes quickly active and rotates the tumbler, so as to rapidly flopthe fly-plate over to its starting-point ready to engage a newbag-section and have its arms 40 engaged by the pins of the cylinder,cam 56 withdrawing stop-finger 53 to idle position so soon as thefly-plate shall have again come under the domination of thecarrier-pins. The fly-plate makes a complete revolution with referenceto the axis of the rotary driver 21; but in the same length of time therotary driver makes a revolution, so that the fly-plate never makes acomplete revolution with reference to the rotarydriver.Thefinger-gearing serves in greatly quickening the turning of the flyplate in the driver during a port-ion of the rotation of both. It isthis action of the finger-gearing which permits pinions 50 and 51 to bemutilated. When the fly-plate goes to initial position ready to attackthe bag-section, its sliding motion through the tumbler causes arms4c7to engage dogs 49, thus quickly swinging side grippers 11 to closedposition. At the same time arm 38 is engaged by cam-lug 29, which openedgrippers 10, these grippers promptly snapping shut at the properinstant.The form of camlug 29 is such that as the fly-plate approaches initialposition the grippers 10 are wide open, the grippers promptly closingupon the trailing flap of the bag-section; but in practice there may bea little slackness in the trailing flap. I-Ience cam-lug 29 has a pointacting the second time to open grippers 10 to a slight degree, thuspermitting the slack of the flap to readjust itself in the grippersbefore final closure. When the fly-plate completes its folding motionits sliding motionin the tumbler causes fingers 4G to engage dogs 48,whereby said grippers ll swing to ina'ctive position. At the same timearm 38 rides upon cam 39, thus opening grippers 10, the result beingthat when the fly-plate reaches final folding position all of itsgrippers are released and the carrier is at liberty to move onward withthe bag-section.

Referring further to the drawings, 60, Figs. 1, 2, 9, and 11, indicatesa sash sliding in the rear grooves 30 of cam 27; (51, a pair ofdownwardly and rearwardly reaching arms pivoted to the lower portion ofthis sash; 62, a spring arrangedupon the pivot of these arms and tendingto hold them yieldingly in their most elevated position; 63, a stop-pinconnected with the arms and serving to limit the upward movement of thearms; 64, an arm fast with arms 61. and bearing a roller adapted toengage to the front or rear of cam-lug 31; 65, a roll journaled in thefree extremities of arms (51, this roll forming the first dance-roll;66, a rock-shaft mounted in the frame parallel with shaft 54:; 67, a camfast on shaft 54; 68, a sleeve loose on rock-shaft 66; 69, an arm fastwith sleeve 68 and having a roller bearing on the periphery of cam 67,which cam, however, is partly shrouded, so as to constitute a peripheralcam partially formed with a facial groove, as seen in Fig. 1; 70, an armfast with sleeve 68 and linked to sash 60; 71, a spring acting on arm 69and tending to hold its roller in contact with the periphery of cam 67and tending to urge sash 60 and the dance-roll 65, carried by it, to itslowermost position, and 71 a finger connected with arm 61 and projectingdownwardly, so as when the dance-roll is down upon the carrier to beengaged by the pin 19 of the carrier.

Referring to Fig. 11, dance-roll 65 is normally up'and out of action andheld so by its cam 67, spring '71 seeking to draw it down. At theinstant the fly-plate has turned with its edge in most forward position,having completed the opening of the bag-section, cam 67 permitsdance-roll 65 to move downwardly to the carrier. In the descent of thedance-roll itstrikes the bag-section squarely central of the bulgingsides formed by the opening operation, and in its continued descent itpresses down the paper, thus flattening the central portion of the fold,and it finally bears directly at the central folding-line, pressing thepaper to the toe of the fly-plate. WVhen dance- 1'01165 has taken thisposition, then finger 71 is in the path of pin 19 of the carrier, whichpin is ready to advance outof engagement with the arm of the fiy-plate.The carrier-pin therefore presses dance-roll 65 forward, during whichmovement it passes forwardly under its center of suspension, the angularmotion of its arms 61 causing the sash 60 to rise against the tension ofspring 71, the dance-roll thus exerting a yielding pressure upon thediamond fold at the central foldingline. The carrier-pin causes thelower periphery of dance-roll 65 to move at the same speed as thebag-section; but as the center of the roll is higher than its peripheryand is constantly swinging farther forward under its point of suspensionit follows that the roll has a slight retrogressive motion on the paper,thus traveling backward a trifle upon the folds while still engaged bythe toe of the fiyplate. When the carrier-pin leaves the flyplate, thebag-section advances off of the flyplate, the dance-roll continuing itsforward motion, but not quite so fast as the bag-section, the centralfold being thus nicely pressed by the dance-roll. Finally thecarrier-pin leaves arm 71 and the bag-section continues on under thedance-roll, which completely presses a portion of the trailing flap ofthe diamond fold. Nhen the trailing flap shall have partly passed underthe dance-roll, then the cam permits the roll to rise again to normalidle position. As dance-roll 65 descends roller 64 is in front ofcam-lug 31; but when the dance-roll is being urged forward by thecarrier-pin then roller 6% gets to the rear of cam-lug 31, so that assash 60 rises the danceroll will not be capable of being snappedsuddenly to normal position on its suspending pivots by spring 62,cam-lug 31 permitting spring 62 to act gradually during the ascent ofthe sash. The matter just described constitutes the first dance-rollsystem and has to do only with the trailing portion of the diamond fold.

' Referring further to the drawings, 72, Figs. 1, 2, 10, and11,indicates the sash of the second dance-roll, sliding in the frontgrooves 30 of cams 27; 73, suspension-arms pivoted thereto; 74, a springon the pivot of these arms tending to press the arms downward; 7 5, thesecond dance-roll mounted in the free extremities'of arms 73; 76, a camfast on shaft 54; 77, an arm fast on shaft 66 and having a rollerengaging the periphery of cam 76; 78, an arm fast on rock-shaft 66 andlinked to sash 72, and 79 a spring connected with arm 77 and tending tourge sash 72 to its uppermost position.

Referring to Fig. 11, second dance-roll 75 is normally up and idle andheld up yieldingly by spring 7 9. Cam 76 forces roll 7 5 downwardly tothe carrier, so as to engage the bag-section at theinstant the centralfolding-line comes under the first dance-roll.

, The cam continues to force sash 72 downward, the result being thatdance-roll 75 is forced forwardly at a higher rate of speed than thebag-section, the dance-roll thus rolling and pressing the prow portionof the diamond fold.

from what follows: In Fig. 14 the fiy-plate is in what may be calledinitial position being still under the domination of the fingergearing,which is rapidly moving the active edge of the plate toward the carrier.The side grippers of the plate are open. The carrier is advancing thebag-section, which is gripped to it. The two dance-rolls are up andidle. Fig. 15 illustrates the next position. The finger gearing hasturned the plate so as to bring its active edge down clampwise upon thebag-section at the central folding-line. The plate-grips have allclosed. The trailing-flap grip on the fly-plate has opened and closedand slightly opened and again closed, so as to take care of the slack inthe trailing flap. The finger-gear has ceased its engagement, and thecarrier-pins have engaged the notched'arms of the plate, Whereupon theplate comes under the domination of the carrier, the active edge of theplate accompanying the central folding-line of the bag section and theplate opening up the trailing flap. Fig. 16 illustrates the thirdposition. The active edge of the plate has been carried forward with thecentral folding-line of the bag-section, and the trailing flap has beenfolded well back. The active edge of the flyplate hasbeen carried to itsmost advanced position and all of its grips are opening. The first danceroll has come down and depressed the sides of the fold and has taken abearing on the bag-section over the toe of the plate, the plate nowremaining stationary and the first dance-roll moving forward under theinfluence of the carrier-pin,but crawling somewhat backward upon thetrailing fiap, thus taking domination 'of the central fold as the samegradually withdrawsfrom the toe of the plate. Fig 17 illustrates thenext position. The first dance-roll has beencarried still farther forward, but has worked somewhat backward relative to the folding-line. Thecarrierpins have left the notched arms of the flyplate, and thefinger-gearing has taken domination of the fly-plate and is ready toquickly floplit over to initial position. The second dance-roll isdescendingand is near the carrier. Fig. 18 illustrates the nextposition.

The finger-gearing has turned the fly-plate rapidly toward its initialposition. Thesecond dan ce-roll has engaged the diamondfold and hasbegun its rapid forward travel over the prow-flap. Fig. 19 illustratesthe next position. The finger-gearing has turned the fly-plate welltoward initial position. The continued descent of the sash of the seconddance-roll has forced that roll forward over the prow-flap. The firstdance-roll has disengaged from the carrier-pin and the trailing flap haspassed partially under it and been subjected to its pressing action, andthe roll has again gone up toward idle position. Fig. 14, beforereferred to, illustrates the next or initial position, the edge of thefly-plate coming down upon the next bag-section. The second dance-rollhaving completed its forward trip moves back, still pressing on thediamond fold and finally rises again to normal idle position. After thediamond fold has been thus far completed the carrier takes it forwardfor the usual subsequent treatment.

I claim as my invention 1. In a paper-bag machine, the combination,substantially as set forth, of a carrier adapted to advance abag-section, a gripper mounted on the side thereof and adapted toengagea lower triangle of the bag-section and clamp the same to thecarrier, a section of said gripper movably mounted with reference to theremainder of the gripper, a spring pressing said section into the planeof the main portion of the gripper, a projection connected with saidsection, and a cam adapted to be engaged by said projection to presssaid section out of the plane of the main portion of the gripper andaway from the carrier.

2. In a paper-bag machine, the combination, substantially as set forth,of a carrier adapted to receive and advance a bag-section, agripper-body pivoted to the side thereof, a gripper-finger on said bodyadapted to engage over the face of the carrier, a rod sliding in saidgripper-body, a finger on said rod and forming an independently-movablesection of the gripper,a spring on said rod serving to press said fingerinto the plane of said gripper, a stud projecting from said rod, and acam adapted to be engaged by said stud to move said finger out of theplane of said gripper and away from the surface of the carrier.

3. In a paper-bag machine, the combina tion, substantially as set forth,of a carrier adapted to hold and advance a ba -section, a rotary drivermounted across the carrier, a fly-plate mounted in the driver andcapable of sliding motion with reference to the axis of the driver,projections sidewise from the fly-plate, and cams engaging saidprojections and controlling the sliding motion of the flyplate.

4- In a paper-bag machine, the combination, substantially as set forth,of a carrier adapted to hold and advance a bag-section, a rotary drivermounted across the carrier, a fiy-plate mounted in the driver andcapable of sliding motion with reference -to the axis of the driver andhaving a thin flexible edge adapted to cooperate with the surface of thecarrier, projections sidewise from the flyplate, and cams engaging saidprojections and controlling the sliding motion of the fly-plate.

5. In a paper-bag machine, the combination, substantially as set forth,of a carrier adapted to hold and advance a bag-section, a rotary drivermounted across the carrier, a tumbler eccentrically mounted in saiddriver, a fly-plate mounted for sliding motion in said tumbler andhaving an edge adapted to cooperate with the surface of the carrier, andcams adapted to control the sliding motion of the fiy-plate in thetumbler.

6. In a paper-bag machine, the combination, substantially as set forth,of a carrier adapted to hold and advance a bag-section,

a pin carried thereby,a rotarydriver mounted across the carrier, afly-plate mounted in the driver and having an edge adapted to cooperatewith the carrier, a notched arm mounted on the fly-plate and adapted tobe engaged by said pin whereby said pin advances the active edge of thefly-plate, and gearing connected with the fly-plate to serve in rotatingthe same when said pin is disengaged from said notched arm.

7. In a paper-bag machine, the combination, substantially as set forth,of a carrier adapted to hold and advance a bag-section, a rotary drivermounted across the carrier, a tumbler mounted eccentrically therein, aflyplate mounted for sliding motion in the tumbler and having an edgeadapted for cooperation with the carrier, a notched arm mounted on thefly-plate, a pin mounted on the carrier and adapted to cooperate withsaid notched arm, a gear on said tumbler, a gear engaging said gear andprovided with a finger, a stopfinger adapted to move into the path ofsaid first-mentioned finger, and a rotary cam connected with saidstop-finger and serving to move it into and out of the path of thefirstmentioned finger.

8. In a paper-bag machine, the combination, substantially as set forth,of a carrier adapted to hold and advance a bag-section, a rotarydriver'mounted across the carrier, a fly-plate carried by the driver andhaving sliding motion with reference thereto, grippers mounted on saidfly-plate and adapted to engage the trailing flap and the uppertriangles of the bag-section, and mechanism for opening and closing saidgrippers.

9. In a paper-bag machine, the combination, substantially as set forth,of a flat plate adapted to have the flap of a bag-section clampedagainst its surface, a rock -shaft mounted across said plate near saidsurface, a pair of cylindrical studs projecting from said rock-shaft andadapted to bear with their bodies against the surface of said plate, andmechanism for rocking. said rock-shaft.

10. In a paper-bag machine, the combination, substantially as setforth,of a flat plate adapted to have the flap of a bag-section clampedagainst its surface, a rock-shaft mounted across said plate near saidsurface, a pair of cylindrical studs projecting from said rock-shaft andadapted to bear with their bodies against the surface of said plate,tubular elastic jackets on said studs, and mechanism for rocking saidrock-shaft.

11. In a paper-bag machine, the combination, substantially as setforth,,of a carrier adapted to hold and advance a bag-section, a rotarydriver mounted across the carrier, a tumbler mounted eccentricallytherein, a flyplate mounted for sliding motion in said tumbler, armspivoted on said fly-plate, gripperfingers on said arms, dogs mounted onsaid tumbler, and fingers connected with said arms and adapted, as thefly-plate slides in the tumbler, to move said gripper-fingers 'to activeand idle position.

12. In a paper-bag machine, the combination, substantially as set forth,of a carrier adapted to hold and advance a bag-section, a rotary drivermounted across the carrier, a tumbler mounted eccentrically in saiddriver, a fly-plate mounted for sliding motion in said tumbler, atrailing-flap gripper mounted on said fly-plate, arock-shaft mounted onthe flyplate and connected with said gripper, an arm on said rock-shaft,and a cam on said tum-- bler in position to be engaged by said arm.

13. In a paper-bag machine, the combination, substantially as set forth,with a carrier adapted to hold and advance a bag-section, and afly-plate adapted to form the diamond fold of the bag-section, of aroller mounted for movement to and from the carrier,- and a cam andconnecting mechanism arranged to act 011 said roller and move the sameto the carrier at the time the fly-plate has completed its foldingoperation and the active edge of the fly-plate is beneath the roller.

14. In a paper-bag machine, the combination, substantially as set forth,with a carrier adapted to hold and advance a bag-section, and afly-plate adapted to form the diamond fold of the bag-section, of a sashmounted to slide to and from the carrier, a cam and connecting mechanismarranged to move said sash, arms pivoted to said sash, a roller carriedby said arms, a spring tending to flex said arms and hold said roller ina direction away from the carrier, a finger connected with said arms,and a pin on said carrier adapted to engage said finger and rock saidarms and carry said roller along with the carrier.

15. In a paper-bag machine, the combination, substantially as set forth,with a carrier adapted to hold and advance a bag-section, and afly-plate adapted to form the diamond fold of the bag-section, of a sasharranged to slide to and from the carrier, a cam and connectin gmechanism arranged to give said sash its movements, arms pivoted to saidsash and extending toward the carrier and forward in the direction ofadvance of the carrier, a spring urging said arms in a direction againstthat of the motion of the carrier, and a roller mounted in the freeextremities of said arms.

16. In a paper-bag machine, the combination, substantially as set forth,with a carrier adapted to hold and advance a bag-section, and afly-plate adapted to form the diamond fold of the bag-section, ofv apair of sashes mounted for movement to and from the carrier, cams andconnecting mechanism. arranged to give said sashes their movements, armspivoted to the sash nearest the fly-plate and projecting toward thecarrier and toward the fiy-plate, a roller mounted in said arms, aspring tending to hold said roller in its position nearest thefly-plate, a finger connected with said arms, a pin on the carrieradapted to cooperate with said finger and move said roller with thecarrier, arms pivoted to the second sash and projecting toward thecarrier and in its direction of advance, a roller mounted in saidlast-mentioned arms, and a spring urging said last-mentioned. roller inthe direction against that of the advance of the carrier.

MURRAY SOIIENGK.

Witnesses:

J. W. SEE, M. S. BELDEN.

